J. Laiho

B- and D-meson decay constants from three-flavor lattice QCD

We calculate the leptonic decay constants ofB (s) andD (s) mesons in lattice QCD using staggered light quarks and Fermilab bottom and charm quarks. We compute the heavy-light meson correlation functions on the MILC asqtad-improved staggered gauge congurations which include the eects of three light dynamical sea quarks. We simulate with several values of the light valence- and sea-quark masses (down to ms=10) and at three lattice spacings (a 0.15, 0.12, and 0.09 fm) and extrapolate to the physical up and down quark masses and the continuum using expressions derived in heavy-light meson staggered chiral perturbation theory. We renormalize the heavy-light axial current using a mostly nonperturbative method such that only a small correction to unity must be computed in lattice perturbation theory and higher-order terms are expected to be small. We obtain f B+ = 196:9(8:9) MeV, fBs = 242:0(9:5) MeV, f D+ = 218:9(11:3) MeV, fDs = 260:1(10:8) MeV, and the SU(3) avor-breaking ratios fBs =fB = 1:229(26) and fDs =fD = 1:188(25), where the numbers in parentheses are the total statistical and systematic uncertainties added in quadrature.

B→πlν semileptonic form factor from three-flavor lattice QCD: A model-independent determination of |Vub|

We calculate the form factor

Lattice QCD ensembles with four flavors of highly improved staggered quarks

{f}_{+}({q}^{2})

Refining new-physics searches in B→Dτν with lattice QCD.

for

Scaling studies of QCD with the dynamical highly improved staggered quark action

B

Evidence for asymptotic safety from lattice quantum gravity.

-meson semileptonic decay in unquenched lattice QCD with

Erratum: B s→D s/B→D semileptonic form-factor ratios and their application to BR(Bs0→μ +μ -)

2+1

Tuning Fermilab heavy quarks in 2+1 flavor lattice QCD with application to hyperfine splittings

flavors of light sea quarks. We use Asqtad-improved staggered light quarks and a Fermilab bottom quark on gauge configurations generated by the MILC Collaboration. We simulate with several light-quark masses and at two lattice spacings, and extrapolate to the physical quark mass and continuum limit using heavy-light meson staggered chiral perturbation theory. We then fit the lattice result for

Neutral B-meson mixing from three-flavor lattice quantum chromodynamics: Determination of the SU(3)-breaking ratio ξ

{f}_{+}({q}^{2})

Visualization of semileptonic form factors from lattice QCD

simultaneously with that measured by the BABAR experiment using a parameterization of the form-factor shape in